Abstract: The mining area is located in La Yesca,Nayarit,Mexico.The exploration results show that it is a large altered rock type low temperature hydrothermal silvermanganese polymetallic deposit.The composition,structure,structure,alteration features and the occurrence state of beneficial elements are analyzed.The results show that the main useful elements are manganese,silver,lead,zinc and copper and so on,the metallic minerals that make up the ore are mainly pyrolusite,chalcophanite,hausmannite,coronadite,limonite,etc..The beneficial composition of the ore is Ag,followed by Mn,Pb,Zn and a small amount of Cu,Au,the average ore grade of the deposit is Ag 24318 g/t,Pb 051%,Zn 115%,Mn 983%,Cu 020%,Au 018 g/t.Industrial ores are mainly massive metallic sulfide and veinsimpregnated ores,and contain a small amount of silver manganese lead zinc,manganese lead zinc and lead zinc metal sulfide.

Key words: Agpolymetallic deposit,Ore Characteristics,Occurrence state